Nail file



FIG. 1 is a front and top perspective view of a nail file showing our new design; The ring in broken lines shown for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a top plan view thereof; the bottom view being a mirror image;

FIG. 5 is a left side elevation view thereof; and,

FIG. 6 is a front elevation view thereof. 

The ornamental design for a nail file, as shown and described. 